A prothoracic seta, associated with seta 6-CT to form the more posterior setal group of the pronotum; usually interpreted as being the more posterior and/or mesal of the two; with seta 6-CT, probably homologous with either larval setae 3- and 4-P, 4- and 0-P or 4- and 5-P, respectively.
Pupal chaetotaxy: seta 7-CT